Three questions for a future, not completely noob, working pup owner...

It has been a number of years since I read the books recommended by you: Rutherford/ Neil, Susan Barwig, and Ivan Balabanov were authors you’ve recommended in the past. Have you added to your list? Did you also suggest Koehler?

The "clicker" movement has made significant gains in the past decade. At the risk of starting a flame-war, dare I ask if the clicker has been added to your training tool bag? If so, may I ask under what circumstances?

Finally, have you adjusted your position on training techniques for "working" GSD puppies and/or adults based on the many new theories romping about the Internet? In other words, is there research I can do before my pup comes to its new home, to be more in alignment with the training practices prescribed by you?